That sounds like a good idea, it would be very difficult to accomplish though. You have to make sure you have extreme measures to contain the bacteria, etc. You couldn't just let them go loose on a landfill. Genetic engineering as a whole has yielded some extremely important advances, without it modern agriculture wouldn't be anything what it is today.
The only thing that really makes me nervous about scientific advances in genetic engineering is some scientist in like North Korea working to genetically enhance humans to make like super warriors. I know that sounds really science fictiony, but I don't think its that farfetched.